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VulnerabilityPublished Updated

CVE-2026-43007: Linux kernel · accel/qaic: Handle DBC deactivation if the owner went away

Affects Linux kernelSource GCVE Database

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Not known to be exploited.

Data as of 12 Nov 2026, 00:51 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 1 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

AI-suggested

A fix has been implemented in the Linux kernel to handle QAIC_TRANS_DEACTIVATE_FROM_DEV transactions received after the user has gone away, preventing resource leaks and hangs. Users should update to the fixed kernel version once available. No other mitigation steps are indicated.

Description

A vulnerability in the Linux kernel's accel/qaic component involves improper handling of DBC deactivation when the owning user process terminates prematurely. This can cause the host to become out-of-sync with available DBCs, leading to resource leaks and indefinite hangs when a new user tries to activate a network using the same DBC.

References

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